EP2342545B1 - Anneau dynamométrique avec boîtier de forme annulaire - Google Patents

Anneau dynamométrique avec boîtier de forme annulaire Download PDF

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Publication number
EP2342545B1
EP2342545B1 EP09779093A EP09779093A EP2342545B1 EP 2342545 B1 EP2342545 B1 EP 2342545B1 EP 09779093 A EP09779093 A EP 09779093A EP 09779093 A EP09779093 A EP 09779093A EP 2342545 B1 EP2342545 B1 EP 2342545B1
Authority
EP
European Patent Office
Prior art keywords
force
measuring
measuring ring
flange
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Revoked
Application number
EP09779093A
Other languages
German (de)
English (en)
Other versions
EP2342545A1 (fr
Inventor
Alexander Schricker
Alparslan Turan
Alexander Friedl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Piezocryst Advanced Sensorics GmbH
Original Assignee
Piezocryst Advanced Sensorics GmbH
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Filing date
Publication date
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Application filed by Piezocryst Advanced Sensorics GmbH filed Critical Piezocryst Advanced Sensorics GmbH
Publication of EP2342545A1 publication Critical patent/EP2342545A1/fr
Application granted granted Critical
Publication of EP2342545B1 publication Critical patent/EP2342545B1/fr
Revoked legal-status Critical Current
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices

Definitions

  • the invention relates to a force-measuring ring with an annular housing, which accommodates at least one piezoelectric measuring element, as well as with a pressure-transmitting element, which is connected via inner and outer, annular membrane regions with the housing, preferably welded.
  • the invention further relates to devices for measuring axially acting on a shaft or a punch forces.
  • Force measuring rings are used to measure forces, pressures, accelerations and moments and are clamped between power transmission means or machine parts.
  • a measuring sensor with biasing device which consists essentially of an adapter part and an adapter sleeve.
  • the adapter part has in one piece a central clamping sleeve which projects into a central bore of the adapter sleeve and can be pretensioned there by a nut.
  • a force-measuring ring is integrated, wherein the measuring elements of the force-measuring ring are present in an annular housing and are covered by a diaphragm abutting the adapter part.
  • the membrane is attached under prestress by welding to the sensor housing.
  • the force-measuring ring 1 has an annular housing 2, which forms an annular receptacle bounded by an inner flange 8 and an outer flange 9, in which two piezoelectric measuring elements 5 and a deflecting electrode 6 arranged therebetween are accommodated.
  • the discharge electrode 6 leads to a plug element 7 fastened to the outer flange 9. The force acting on the force-measuring ring 1 is introduced into the piezoelectric measuring elements 5 via the pressure-transmitting element 11.
  • the pressure-transmitting element 11 has an inner membrane region 12 and an outer membrane region 13, which are welded to the inner flange 8 and the outer flange 9 of the housing 2.
  • Such force measuring rings are suitable for measurement situations in which the force to be measured is introduced uniformly over the contact surface of the pressure transmission element 11. These are measurement situations, as described, for example, in the above-cited WO 2004/070334 A1 are set out.
  • Fig. 2 shows in cross section a rotating shaft 20 with a load in the axial direction, wherein the shaft axis is denoted by 20 '.
  • the mounted on the rotating shaft ball bearing 21 has an inner cage 22 and an outer cage 23, with which the bearing balls 24 are guided.
  • an annular intermediate piece 25 for uniform distribution of the force on the force-measuring ring 1 is necessary.
  • a disadvantage of this arrangement are on the one hand to call the large height and the higher elasticity of the test setup.
  • the object of the invention is to improve a force measuring ring of the type described above such that the use is satisfactorily possible even with asymmetric force application and limited space.
  • a robust force-measuring ring is to be developed with which axial forces acting on an axial ball bearing can be measured.
  • the housing has a first housing part with an annular inner flange and a first pressure transmission element and a second housing part with an annular outer flange and a second pressure transmission element, wherein the inner membrane region between the inner flange and the second pressure transmission element and the outer membrane region between the outer flange and the first pressure transmitting element is arranged.
  • the inventive design of the force measuring ring creates a measuring ring with high rigidity and low height dimensions, with an intermediate piece to the force-introducing surface, such as an axial ball bearing, can be dispensed with.
  • FIG. 3 and FIG. 4 show in a graphic comparison on an enlarged scale the differences between the prior art ( Fig. 3 ) and the invention ( Fig. 4 ).
  • the inner membrane region 12 and the outer membrane region 13 are arranged on one side of a plane of symmetry ⁇ defined by the piezoelectric measuring element 5 or the measuring element stack of two or more measuring elements 5.
  • the pressure transmission element 11 is thereby connected on both sides only via the thin membrane regions 12, 13 with the inner flange 8 and the outer flange 9 of the housing 2. For a uniform introduction of force therefore an annular spacer 25 is necessary.
  • the situation is different with the force-measuring ring 1 in accordance with the invention Fig. 4 whose housing 2 has a first, lower housing part 3 with an annular inner flange 8 and a first pressure transmission element 10, and a second, upper housing part 4 with an annular outer flange 9 and a second pressure transmission element 11.
  • the inner membrane region 12 is arranged between the inner flange 8 and the second pressure transmission element 11.
  • the outer membrane portion 13 is placed between the outer flange 9 and the first pressure transmitting member 10.
  • the inner flange 8 together with the first pressure-transmitting element 10 and the outer membrane region 13 can be formed in one piece.
  • outer flange 9 can be made reinforced in comparison to the inner flange 8 in order to achieve a further stiffening of the force-measuring ring
  • the outer membrane region 13 is welded at its outer edge to the outer flange 9 and the inner membrane region 12 at its inner edge to the inner flange 8.
  • the inner flange 8 and the first pressure transmission element 10 are formed in cross-section substantially L-shaped. The same applies to the outer flange 9 and the second pressure transmission element 11.
  • Fig. 1 to Fig. 3 can also according to the invention according to the force-measuring ring Fig. 4 to Fig. 7
  • two piezoelectric measuring elements 5 may be arranged in the two-part housing 2, the adjacent contact surfaces contact a discharge electrode 6.
  • a plug element 7 (see Fig. 6 and Fig. 7 ) can in the same way - as in Fig. 1 shown - be arranged on the outer flange 9.
  • Fig. 5 is the force measuring ring 1 according to Fig. 4 shown in a mounting situation for measuring the axial forces of an axial ball bearing 21.
  • the necessary in known force measuring rings intermediate ring 25 for the uniform introduction of the bearing forces can be omitted here, whereby the overall height of the measuring device is substantially reduced.
  • the shaft 20 is supported, for example with a shoulder 26 of the shaft 20, with the interposition of an axial ball bearing 21 on the force-measuring ring 1.
  • Fig. 8 is shown a further advantageous application example of the invention.
  • This is a device for measuring a force acting axially on a punch 27 force using the force measuring ring according to the invention 1.
  • the punch 27 acts on the force to be measured, passes through the force measuring ring 1 with its shaft 28, wherein the shaft 28 at the annular Inner flange 8 of the force measuring ring 1 is applied and centered by this.
  • the force measuring ring 1 is supported on an inner flange 29 of the housing 30.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Claims (9)

  1. Anneau dynamométrique (1) comportant un boîtier annulaire (2) qui reçoit au moins un élément de mesure piezoélectrique (5), ainsi qu'un élément de transmission de la pression qui est relié de préférence soudé par l'intermédiaire de zones de membranes annulaires internes et externes (12, 13) en forme de couronne circulaire avec une bride interne annulaire (8) et une bride externe annulaire (9) du boîtier,
    caractérisé en ce que
    la zone de membrane interne et la zone de membrane externe (12, 13) de l'anneau dynamométrique (1) sont situées sur des côtés opposés d'un plan de symétrie (ε) défini par l'élément de mesure piezoélectrique (5).
  2. Anneau dynamométrique (1) conforme à la revendication 1,
    caractérisé en ce que
    le boîtier (2) comporte une première partie de boîtier (3) comprenant la bride annulaire interne (8) et un premier élément de transmission de la pression (10) ainsi qu'une seconde partie de boîtier (4) comprenant la bride annulaire externe (9) et un second élément de transmission de pression (11), la zone de membrane interne (12) étant située entre la bride interne (8) et le second élément de transmission de la pression (11) tandis que la zone de membrane externe (13) est située entre la bride externe (9) et le premier élément de transmission de la pression (10).
  3. Anneau dynamométrique (1) conforme à la revendication 2,
    caractérisé en ce que
    la bride interne (8), le premier élément de transmission de la pression (10) et la zone de membrane externe (13), d'une part ainsi que la bride externe (9), le second élément de transmission de la pression (11) et la zone de membrane interne (12), d'autre part sont respectivement réalisés en une seule pièce.
  4. Anneau dynamométrique (1) conforme à la revendication 2 ou 3,
    caractérisé en ce que
    la zone de membrane externe (13) est soudée sur son bord extérieur avec la bride externe (9), tandis que la zone de membrane interne (12) est soudée sur son bord interne avec la bride interne (8).
  5. Anneau dynamométrique (1) conforme à l'une des revendications 2 à 4,
    caractérisé en ce que
    la bride interne (8) et le premier élément de transmission de la pression (10) ainsi que la bride interne (9) et le second élément de transmission de la pression (11) sont respectivement réalisés avec une section essentiellement en forme de L.
  6. Anneau dynamométrique (1) conforme à l'une des revendications 2 à 5,
    caractérisé en ce que
    la bride externe (9) est renforcée par rapport à la bride interne (8).
  7. Anneau dynamométrique (1) conforme à l'une des revendications 1 à 6,
    caractérisé en ce que
    dans le boîtier annulaire (2) sont montés deux éléments de mesure piezoélectriques (5) dont les surfaces de contacts voisines viennent en contact avec une électrode de décharge (6) située entre celles-ci.
  8. Dispositif de mesure d'une force agissant axialement sur un arbre (20) en utilisant un anneau dynamométrique (1) conforme à l'une des revendications 1 à 7,
    caractérisé en ce que
    l'arbre (20) s'appuie sur l'anneau dynamométrique (1) par exemple par un talon (26) avec interposition d'un roulement à billes axial (21).
  9. Dispositif de mesure d'une force agissant axialement sur un poinçon (27) en utilisant un anneau dynamométrique (1) conforme à l'une des revendications 1 à 7,
    caractérisé en ce que
    le poinçon (27) traverse l'anneau dynamométrique (1) par une tige (28), cette tige (28) s'appliquant sur la bride interne annulaire (8) de l'anneau dynamométrique (1) et étant centrée par celle-ci.
EP09779093A 2008-11-04 2009-02-26 Anneau dynamométrique avec boîtier de forme annulaire Revoked EP2342545B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0172108A AT507198B1 (de) 2008-11-04 2008-11-04 Kraftmessring mit einem ringförmigen gehäuse
PCT/EP2009/052283 WO2010052029A1 (fr) 2008-11-04 2009-02-26 Anneau dynamométrique avec boîtier de forme annulaire

Publications (2)

Publication Number Publication Date
EP2342545A1 EP2342545A1 (fr) 2011-07-13
EP2342545B1 true EP2342545B1 (fr) 2013-01-30

Family

ID=40756617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09779093A Revoked EP2342545B1 (fr) 2008-11-04 2009-02-26 Anneau dynamométrique avec boîtier de forme annulaire

Country Status (5)

Country Link
US (1) US8539845B2 (fr)
EP (1) EP2342545B1 (fr)
JP (1) JP5495397B2 (fr)
AT (1) AT507198B1 (fr)
WO (1) WO2010052029A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2841897B1 (fr) * 2012-04-23 2021-12-15 Linak A/S Actionneur linéaire
CN112857647B (zh) * 2021-03-25 2023-01-03 哈尔滨工程大学 一种活塞环周向弹力检测装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5643007Y2 (fr) * 1977-04-26 1981-10-08
JPS6184538A (ja) * 1984-10-02 1986-04-30 Honda Motor Co Ltd エンジンの燃焼圧力検出器
JPS6378233U (fr) * 1986-11-10 1988-05-24
CH682182A5 (fr) * 1990-05-31 1993-07-30 Kk Holding Ag
CH683718A5 (de) * 1992-05-15 1994-04-29 Kk Holding Ag Kombinierter Kraft-, Dehnungs- und Schallemissionsaufnehmer.
JPH07120334A (ja) * 1993-10-21 1995-05-12 Nippon Seiko Kk 回転支持部分のスラスト荷重測定装置
AT405495B (de) * 1996-06-05 1999-08-25 Miba Sintermetall Ag Vorrichtung zum zusammenbau einer synchronisiereinrichtung für ein zahnradwechselgetriebe
EP1590641B1 (fr) * 2003-02-05 2010-09-22 Kistler Holding AG Capteur de mesure avec dispositif de precontrainte
AT503662B1 (de) * 2006-04-20 2007-12-15 Piezocryst Advanced Sensorics Glühkerze mit integriertem drucksensor
AT503816B1 (de) * 2006-06-06 2008-01-15 Piezocryst Advanced Sensorics Piezoelektrischer sensor
AT9920U1 (de) * 2007-07-27 2008-05-15 Piezocryst Advanced Sensorics Kraftsensor
AT506705B1 (de) * 2008-09-11 2009-11-15 Piezocryst Advanced Sensorics Piezoelektrischer drucksensor

Also Published As

Publication number Publication date
WO2010052029A1 (fr) 2010-05-14
AT507198B1 (de) 2010-03-15
US8539845B2 (en) 2013-09-24
JP5495397B2 (ja) 2014-05-21
EP2342545A1 (fr) 2011-07-13
JP2012507694A (ja) 2012-03-29
AT507198A4 (de) 2010-03-15
US20110219888A1 (en) 2011-09-15

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